Locomotive structure



Aug. 14, 1928.

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W. M. SHEEHAN LOCOMOTIVE STRUCTURE Filed Aug. 19, 1926 5 Sheets-Sheet 5Qm W N m m hN Iva EN 7 01?: W/Wiam M 5/: 6 6114/1 Arm .5.

Patented Aug. 14, 1928.

UNITED STATES PATENT OFFICE.

WILLIAI H. SKEEHAN, OF ST. LOUIS, MISSOURI, ASSIGNOB TO cononwnam'nSTEEL COMPANY, OF GRANITE CITY, ILLINOIS, A CORPORATION OF NEW JERSEY.

LOCOHOTIVE STRUCTURE.

Application filed August 19, 1828/ Serial 110. 180,208.

My invention relates to railway rolling stock and consists in animproved construction of underfraining for locomotives of thearticulated type.

The main ob'ect of my invention is to provide an articulated underiramefor a locomotive in which each of the articulated por-.

I a o desire to provi e cast steel under-- frame members on which thesteam cylinders may be directly mounted and which will have integralportions formingbparts of the steam passageways from the iler to thecylinders.

I also desire in such production to provide integral brackets for theapplication of brake cylinders, hangers, and levers, for the mounting ofa cradle member and for mounting a front coupler or other drafttransmitting device. 7

In the accompanyin drawings which i1- 5 lustrate a selected em odimentof my invention-- Figure 1 is a side elevation of the two main units ofmy improved underframe assembled with each other and showing the mainelements of the locomotive superstructure in broken lines.

Figures 2 and '3, respectively, are top and side views of the frontunderframe member illustrated in Figure 1.

Figures 4 and 5 are similar views of the rear underframe memberillustrated in Figure 1.

Figures'6, 7, and 8 are longitudinal vertical sections on lines 6-6,7-7, and 8-8,

respectively, of Figure 2.

Figures 9 to 22, inclusive, are vertical transverse sections on lines9-9, 10-.10, etc. of Figure 3.

Figure 23 is a vertical lon 'tudinal section taken on lines 2323 of iare 4.

Figures 24 to 30, inclusive, and igures 33, 34, and 35,' are verticaltransverse sections taken on lines 24-24, 25'25, etc. of Figure 5.

Figures 31 and 32 are horizontal sections taken on lines 31-31 and 32-32of Figure 5.

I shall refer to the front underframe unit generally by the referenceletter A and shall refer to the rear underframe unit generally by thereference letter B. Each of these units consists of a one-piece castinghaving spaced sides, the sides of unit A having recesses 1 for receivingthe driver boxes (not shown) and at either side of these recesses theside portions 2 are substantially boxshaped in cross section to :providerigid pedestal and load transmitting sections. These sidesare connectedby transverse elements disposed both horizontally as indicated at 3 invarious cross sections, and vertically as indicated at 4, these varioustransverse elements being provided with openings and recesses 5 forlightening the same for providin access to the space between the sidesan for accommodating various items of equipment, such as piping, brakerigging, etc.

The unit is provided with an outwardly extending member 6 havingupwardlyfacing bearings 7 adapted to slidably support suitable brackets 8mounted on the boiler C. Another transverse member 9 has its top facefinished to provide a bearing for a similar bracket 10.

Between the recesses 1 in the sides of the casting are located suitablefulcrums 11 on which the equalizers not shown) are mounted and belowthese fulcrums are brackets 12 for mounting the brake hangers.

The lefthand end of unit A terminates in a bracket 13 upon which thebuffer beam 14 and draft devices 15 may be mounted. Between brackets 13and the nearest pedestal I provide a machined face 16 for mounting thesteam cylinder (not shown) and the inner portion of the casting adjacentfaces 16 are provided with suitable webs arrang to form steampassageways 17 leading to the cylinders. Transverse member 9',previously referred to, has an integral steam passageway forming portion18 terminating 1n mtegral flanges 19, and it will be understood thatsuitable piping (not shown) connects passageways l7 and 18.

The forward portion of unit is also provided with a center pin guide 19which serves as a bearing for a pivoted pony truck. the wheels of whichare indicated at 20 in Figure 1. Suitable valve gear brackets 21 areprovided on the sides of the frame adjacent to the cylinder mounting.

At the rear end of unit A I provide a centrally located rearwardlyextending integral projecting tongue 22, forming a pivotal joint elementwhich fits into the pocket 23 (see Figure 23) formed on the forward endof unit B and provided with suitable bosses 24 for receiving the pivotpin which assembles the two underframe units. Longitudinal stresses aretransmitted through these elements. Vertical loads are passed from oneunit to the other by means of the tongues 38 and recesses 39 whichslidably interengage, permitting longitudinal and lateral movement oftheir contact surfaces.

The portion of unit B above pocket forms a saddle 25 to which the boilerC is rigidlv secured and near the rear .end of unit suitable brackets 26are provided for the boiler supporting expansion plates 27 (see Figure1). It will be understood that the rear end of the boiler is free tomove longitudinally of underframe unit B but cannot move transversely ofthe same. The forward part of the boiler is free to move longitudinallyand transversely of under-frame unit A. This mounting of the boilertakes care of the relative movement between the boiler and theunderframe units due to expansion and contraction and due to travel ofthe locomotive on curved track.

The boiler saddle 25 has an integral steam passageway 28 formed thereinand other steam passageways such as 29 are provided in the casting andlead to the faces 30 on which the steam cylinders for the rear unit ofthe underframe are mounted.

The sides of unit B are provided with driving box recesses 31 andpedestal portions 32 similarly to the corresponding parts of the frontunit A and the sides also have equalizer and brake rigging fulcrums 33and 35, respectively, corresponding to fulcrums 11 and 12in unit A.

The rear end of unit B terminates in brackets 36 to which the locomotivecradle v37 (see Figure 1) may be attached.

The structure described eliminates a large amount of the machining andassembling work required for the ordinary built-up structure andproduces a two unit underframe of greater strength, for a given weight.than a built-up structure. The delays and expense, due to repairs, andother disadvantages of built-up structure are also avoided.

The details of my invention may be modified substantially withoutdeparting from the spirit thereof and I contemplate the exclusive use ofsuch details as come within the scope of my claims.

I claim:

1. In an articulated locomotive. a cradle at one end, a draft clementcarrier at the other end, and two castings between and respectivelymounting said cradle aml carrier and forming the underframe for thelocomotive.

2. In an articulated locomotive, a cradle at one end, a draft elementcarrier at the other end, and two castings between and respectivelymounting said cradle and carrier, said castings being pivotallyconnected and forming the under-frame for the locomotive.

3. In an articulated locomotive, a cradle at one end, a draft elementcarrier at the other end, two castings between and respectively mountingsaid cradle and carrier. said castings being pivotally connected andforming the undert'rame for the locomotive, and a boiler fixedly mountedto one of said castings and having sliding bearing on the other of saidcastings whereby the latter may swing relative to said boiler whilesupporting the same.

4. In an articulated locomotive, a cradle at one end, a draft elementcarrier at the end, two castings between and respectively mounting saidcradle and carrier, said castings being pivotally connected and formingthe under-frame for the locomotive and mounting the boiler and steamcylinders and forming portions of the steam passageways between theboiler and steam cylinders.

5. In an articulated locomotive, an underframe consisting of a pair ofcast frames provided with cooperating pivotal joint elements formedintegrally with their respective frames.

6. In an articulated locomotive, an underframe consisting of a pair ofcast frames pivotally assembled with each other and each comprisingdraft transmitting members formed integrally with the respective pivotaljoint elements,

7. In an articulated locomotive, an underframe consisting of a pair ofcast frames pivotally assembled with each other and each comprisingdraft transmittin members and pedestals formed integral y with therespective pivotal joint elements.

8. In an articulated locomotive, an underframe consisting of a pair ofcast frames pivotally assembled with each other and each comprisingdraft transmitting members and pedestals and superstructure supportingelements formed integrally with the respective pivotal joint elements.

9. In an articulated locomotive, an underframe consisting of a pair ofcast frames, one of which frames has an integral saddle Hill adapted tofixedly mount a locomotive boiler and the other of which frames hasintegral elements forming sliding bearings for boiler supportingbrackets.

10. In an articulated locomotive, an underframe consisting of a pair ofcast frames, there being integral steam cylinder mounting elements onthe sides of one of said frames at the inner end thereof, a piv-' otaljoint element between said cylinder mounting elements and formedintegrally therewith and there being a cooperating pivotal joint elementformed integrall with the other of said frames and projecting betweensaid cylinder mounting elements.

11. An underframe member for an articulated locomotive consisting of aone-piece casting having draft transmitting sides and integral outwardlyextending brackets on said sides forming sliding bearings for boilersupporting brackets.

12. An underframe member for an articulated locomotive consisting of aone-piece casting having spaced sides connected intermediate their endsby integral transverse members, there being a centrally locatedarticulated joint element projecting beyond one of the ends of theunderframe member and there being a centrally located draft bracket atthe other end of the underframe member.

13. An underframe member for an articu-, lated locomotive 'consistin ofa one-piece casting having spaced sides each having driving box recessesand portions intermediate said recesses forming pedestals, the outerends of the end ones of said portions being connected by integral drafttransmitting members, one of which members forms an articulated jointelement.

14. An underframe member for an articulated locomotive consisting of aone-piece casting having spaced sides connected by integral transversemembers, one of which members forms a central bearing for a swivelingtruck and another of which members forms a centrally located pivotedjoint element.

15. An underframe member for an articulated locomotive consisting of aone-piece casting with spaced sides each having portions forming drivingbox pedestals, the

outer faces of one of said portions being.

adapted to mount steam cylindersforthe forward driving unit of thelocomotive.

16. In an underframe member for an articulated locomotive consisting ofa onepiece casting having draft transmitting sides with integralpedestals, steam cylinder mounting elements, and equalizer fulcrumbrackets.

17 In an underframe member for an articulated locomotive consisting of aonepiece casting having draft transmitting sides with integralpedestals, and brake hanger fulcrums and equalizer fulcrums formedintegrally with said edestals.

18. A member for an articulated underframe for a locomotive, consistingof a onepiece casting with side frames adapted to mount steam cylinders,there being integral portions intermediate said side frames for bracingthe latter and forming steam passageways.

19. In an articulated locomotive, two underframe castings pivotallyconnected and havin recesses and tongues respectively space from theirlongitudinal center lines and slidingly interengaged to transfervertical loads from one of said castings to the other.

20. In an articulated locomotive, two underframe castings, one of saidcastings having an integral central projection atone end and havingspaced recesses at the sides of said projection, and the other of saidcastings having a central recess for receiving said projection andhaving spaced tongues at the sldes of said recess adapted to enter saidspaced recesses on the other of said castings, said central projectionand recess providing a ivotal connection for transferring longitudinalstresses and said spaced recesses and tongues providing interengagingelements for transferring vertical loads from either casting to theother.

21. In a locomotive of the articulated type, two underframe castingspivotally connected to each other and a boiler fixedly mounted to one ofsaid castings and having a movable bearing on the other of said castingswhereby the latter may swing relative to said boiler while supportingthe same.

22. In a locomotive of the articulated type, combination of two maindriving units, each comprising a plurality of axles; one of said unitshaving mounted on its axles, a bed embodying a hinge tongue pocket; andthe other unit, having mounted on its axles, a one piece castingcomprising two main side frames, a plurallty of cross tie membersconnecting the side frames, and a'hinge tongue.

23. In a locomotive of the articulated type, the combination of two maindriving units, each comprising a plurality of axles; one of said unitshaving -mounted on its axles, a bed, embodying a hinge tongue pocket;and the other unit having mounted on its axles, a one piece casting,comprising two main side frames, acylinder saddle, a hinge tongue and aplurality of cross tie members connecting the side frames.

24. In a. locomotive of the articulated type, the combination of twomain driving units, each comprising a pluralityv of axles; one of saidunits having mounted on its axles, a bed, embodying a hinge tonguepocket; and the other unit embodying a hinge tongue and a. one piececasting, comprising two main side frames, a plurality of cross tiemembers, connecting the frames, and a boiler saddle crossand a one piececasting, comprising two main bearer rojecting laterally beyond theouterside frames, a plurality of cross tie members sides of the frames.connecting the side frames, :1 front frame, a 25. In a locomotive of thearticulated type, boiler saddle crossbearer, and a cylinder sad- 5 thecombination of two main driving units, dle.

each comprising a plurality of axles, one of In testimony whereof Ihereunto aifix my said units having mounted on its axles, a signaturethis 12th day of August, 1926.

bed, embodying a hinge tongue pocket; and

the other unit embodying a hinge tongue, WILLIAM M. SHEEHAN.

